Environmental surveillance detects circulating vaccine-derived poliovirus type 2 that was undetected by acute flaccid paralysis surveillance in 2021 in Uganda.

"data availability the vp1 sequences described have been deposited in the genbank databank with the accession numbers op407913 and op407914. data availability the vp1 sequences described have been deposited in the genbank databank with the accession numbers op407913"

"Declarations Conflict of interestThe authors have no relevant financial or non-financial interests to declare. Ethical approvalAcute flaccid paralysis surveillance is a national program approved by the Uganda Ministry of Health and is supported by the World Health Organization as part of the global goal to eradicate polio. Specimen collection was performed according to the WHO environmental surveillance guidelines. Conflict of interest The authors have no relevant financial or non-financial interests to declare."

"Funding This work was supported using resources provided routinely by the World Health Organization and the US Centres for Disease Control and Prevention to support poliovirus surveillance."